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Related Experiment Videos

Cross correlation studies in primate motor cortex: event related correlation.

J T Murphy, H C Kwan, Y C Wong

    The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques
    |February 1, 1985
    PubMed
    Summary
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    Neural recordings reveal synchronized activity in motor cortex during reaching movements. This coordinated firing across brain regions supports complex forelimb actions and confirms the cortex

    Area of Science:

    • Neuroscience
    • Motor Control
    • Cortical Microcircuits

    Background:

    • The precentral cortex is crucial for voluntary motor control, particularly forelimb movements.
    • Understanding neural communication within the motor cortex is key to deciphering movement generation.

    Purpose of the Study:

    • To investigate functional connectivity and correlated neural activity in the precentral cortex during voluntary reaching.
    • To examine the spatial extent and temporal dynamics of neural synchrony related to forelimb movements.

    Main Methods:

    • Extracellular unit recordings from 237 cell pairs in awake monkeys during reaching.
    • Intracortical microstimulation and passive sensory stimulation to identify joint-related cortical zones.
    • Cross-correlation and spatial analyses to assess neural synchrony and its distribution.

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    Main Results:

    • Significant event-related correlations were found in 72 of 237 recorded cell pairs, coinciding with forelimb movement.
    • Correlated activity spanned contiguous joint zones within the precentral cortex up to 3.5 mm.
    • No preferred direction of correlation was observed, suggesting a distributed network.

    Conclusions:

    • The findings support a nested organizational structure within the forelimb area of the precentral cortex.
    • Neural synchrony across cortical columns likely contributes to the precise execution of reaching movements.
    • This study provides insights into the mechanisms of motor control involving coordinated neuronal ensembles.